Exercise bike



FIG. 1 is a right side view of the exercise bike showing my new design;

FIG. 2 is a left side view thereof;

FIG. 3 is a front view side view thereof;

FIG. 4 is a back view thereof;

FIG. 5 is a top view thereof;

FIG. 6 is a bottom view thereof;

FIG. 7 is a perspective view thereof; and

FIG. 8 is an enlarged illustration of the portion of the exercise bike encircled at 8 in FIG. 1 ; and,

FIG. 9 is an enlarged illustration of the portion of the exercise bike encircled at 9 in FIG. 1 .

The dot-dash broken lines encircling portions of the exercise bike in FIG. 1 illustrated in enlarged views in FIGS. 8 and 9 form no part of the claimed design. 

CLAIM The ornamental design for an exercise bike, as shown and described. 